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Finding the Fourth Proportional to 121,376.42, 167,505.12 and 67,661.74

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Solution

The fourth proportional to 121,376.42, 167,505.12 and 67,661.74 is: 93,376.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,376.42 : 167,505.12 = 67,661.74 : x
  2. Step 2: Convert to fraction form
    121,376.42/167,505.12 = 67,661.74/x
  3. Step 3: Cross multiply
    121,376.42x = 167,505.12 × 67,661.74
  4. Step 4: Simplify right side
    121,376.42x = 11,333,687,459.35
  5. Step 5: Solve for x
    x = 11,333,687,459.35/121,376.42
  6. Step 6: Final answer
    x = 93,376.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.